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Sussex Spaniel Growth Chart
The Sussex Spaniel is a low, long English gundog with a golden-liver coat — a deliberate, methodical hunter that works at its own steady pace and gives voice on the trail. Charming, calm, and a little stubborn. Most reach an adult weight of 35-45 lb between 12 and 14 months.
View weight chart (lb & kg)Calculate Your Sussex Spaniel Puppy's Adult Weight
Enter your Sussex Spaniel puppy's age and current weight for an estimated adult weight range.
Sussex Spaniel weight by age
Typical male and female puppy weight ranges by age, available in lb and kg. Individual puppies may vary.
Most Sussex Spaniel puppies approach adult weight around 14 months, although individuals may finish earlier or later.
These estimated ranges combine the breed's adult weights with a size-based growth curve. They are not measured breed-specific percentiles or health targets. Month labels are rounded approximations; use the week values for each row. How these weight ranges are calculated
Sussex Spaniel Growth Stages
Understanding the typical growth stages helps you know what to expect as your Sussex Spaniel puppy grows.
Neonatal
0–2 weeksPuppies are born with eyes and ears closed, relying entirely on their mother. Rapid weight gain occurs during this period.
Socialization
3–12 weeksEyes and ears open. Puppies begin to explore, play, and learn social behaviors. This is a critical period for development.
Juvenile
3–6 monthsRapid growth continues. Puppies become more independent, start teething, and develop coordination.
Adolescent
6–12 monthsGrowth rate begins to slow. Puppies reach sexual maturity and may test boundaries. Muscle mass develops.
Young Adult
12–15 monthsGrowth is nearly complete. Your puppy is filling out and approaching adult proportions.
Adult
15+ monthsYour puppy has reached their full adult size. Weight should remain relatively stable with proper nutrition.
Sussex Spaniel FAQ
How much will my Sussex Spaniel puppy weigh as an adult?
Adult Sussex Spaniels typically weigh between 35 and 45 lb. The breed standard does not split this range by sex, so both males and females fall in the same 35-45 lb band.
At what age is a Sussex Spaniel fully grown?
Most reach adult weight between 12 and 14 months. They grow at a steady medium-breed pace, so a puppy that looks almost finished at a year still has a little filling out to do.
How accurate is a Sussex Spaniel puppy weight chart?
It is a good guide, but Sussex Spaniels are low, solid dogs and famously food-motivated — a puppy that is allowed too many treats can run above the chart. Track your own puppy's trend over several weeks rather than comparing to a single week's number.
How much should a Sussex Spaniel puppy weigh at 12 weeks?
Check the 12-week row in the weight-by-age table above for the estimated range. If your puppy falls well outside that band, re-check the scale, the lb/kg setting, and the age entry first — a single off reading is more common than a truly unusual puppy.
Do male and female Sussex Spaniels grow differently?
The official adult range is the same for both sexes at 35-45 lb, and the difference is small. One growth chart serves both well.